Wire Drive Assembly Removal And Installation; Trigger Assembly Replacement; Welding Cable Assembly Replacement - Lincoln Electric MAGNUM 100SG Manual Del Operacion

D-4
4. Obtain a new replacement gun tube (if needed).
Remove locking nut from old gun tube and install
onto new gun tube. Nut should be fully threaded
finger-tight against the insulating tube.
5. Slide gun tube's external threads through gun tube
mounting plate and screw the gun tube by hand
into the cable connector until the nut pulls the
mounting plate snug against the connector.
6. Tighten the nut and mounting plate to the connec-
tor with Torque Wrench 10 to 12 ft.-lbs.
7. Reassemble gun. Be careful not to pinch any leads
between gun handle halves.
WIRE DRIVE ASSEMBLY REMOVAL AND
INSTALLATION
1. There are no serviceable or maintainable parts
inside of the wire drive.
2. Remove liner assembly (See Maintenance Section
figures D.2 and D.3).
3. Remove left side of handle.
4. Disconnect black and red leads from drive motor.
Use care to prevent damage to motor's fast-on
electrical tabs.
5. Slide wire drive out of right handle half.
6. When reinstalling wire drive, note the proper motor
lead connection in the figure. Reconnect red motor
lead to positive (+) terminal, marked with red dot at
arrow. Reconnect black lead to other motor termi-
nal. (See figure D.11)
FIGURE D.11
MAINTENANCE
7. Reassemble gun. Be careful not to pinch any leads
between gun handle halves.

TRIGGER ASSEMBLY REPLACEMENT

1. There are no serviceable or maintainable parts
inside of the trigger.
2. Remove spool cover and left side of handle.
3. Slide trigger out of right handle half. Disconnect both
white leads from trigger. Use care to prevent dam-
age to electrical leads and the terminals. (See Figure
D.12)
4. Connect both white leads to the new trigger. Either
lead may be connected to either trigger pin (non-
polarized connections).
5. Slide new trigger into place and reassemble the
gun. Be careful not to pinch any leads between gun
handle halves.
WELDING CABLE ASSEMBLY
REPLACEMENT
1. Generally, there are no serviceable or maintainable
parts, except for both o-rings on the machine's
power and gas connector; these seals may be
replaced. However, there are options:
• Damage to the four #22 AWG control leads at the
gun cable's welding machine end (P6 plug) may be
repairable without removing or replacing the entire
"+" Terminal
gun cable. The leads can be spliced and soldered
Red Dot
back together, and then reinsulated with heat-
shrink tubing. See Table D.1 in Maintenance
Section for a description of the connections.
Black Lead
• Otherwise, the damaged gun cable may be
replaced.
MAGNUM 100SG SPOOL GUN
FIGURE D.12
White Leads
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